Saw-setting device



Dec. 23, 1930. H. H. KNoT'r sAw SETTING DEVICE Filed March 5. 1929 l 2 sheets-sheet 1 Dec. 23, 1930.` H. H. KNoJ'T 1,78607j1 sAw SETTING DEvIcE Filed March 5, 1929 2 Sheets-Sheet 2 Patented Dec. 23, 1930 UNET STATES HARRY H. KNOTT,A OF WASHINGTON, IOWA, ASSIGNOR T AMERICAN PEARL BUTTON COMPANY, OF WASHINGTON, IOWA SAW-SETTING DEVICE Application filed March 5, 1929.

The object of my invention is to provide a saw setting device of simple', durable and comparatively inexpensive construction.

Av further object is to provide a saw setting device especially adapted for setting the teeth of tubular saws, such as those used in button blank lathes. l

A further object is to provide such a device in which the teeth of the saw may be accurately and eiciently set by a rolling operation orby means of two coacting rollers,

adapted to roll the set into the teeth rather than by driving it into them, or setting them by other methods now in use.

More particularly, it is my object to provide a roller adapted to be inserted in the tubular saw and having lugs for setting every other tooth with a single roller coacting with the first one and having lugs to set the remaining teeth of the saw when the two rollers are rolled together.

till a further object is to provide for the saw setting rollers a hinged frame adapted to be raised so that a tubular saw can be easilyinserted in the saw setting device.

With these and other objects in view my invention consists in the construction, arrangement and combination. of the various parts of my device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims, and illustrated in the accompanying drawings, in which: y

Figure 1 is a plan view of my saw setting device, showing a saw in position, ready to be set. i

Figure 2 is a side elevation of the same.

Figure 3 is a cross-sectional view on the line 8-3 of Figure 2.

Figure 4 is an enlarged sectional view on the line 4 4 of Figure 2.

Figure 5 is an enlarged section on the line 5-5 of Figure 1.

Figure 6 is an enlarged view of a portion of Figure 5, illustrating the saw being pushed onto the lower saw setting roller.

Figures 7, 8, and 9 are similar to Figure 6, showing the saw in di'erent positions relative to the saw setting rollers.

to 40 and 42.

Serial No. 344,272.

Figure 10 is an end elevation of a tubular saw showing the teeth without set.

Figure 11 is a similar view showing the teeth after they are set; and

Figure 12 is a sectional view on the line 12-12 of Figure 5. 1

On the accompanying drawings I have used the reference numeral 10 to indicate a base for supporting the various parte of my device.

Bearing members 12 and 14 are formed on the base 10 or suitably secured thereto and are adapted to slidably and rotatably receive a supporting shaft16. The shaft 16 is provided with a collar 18 adjacent the bear ing 12 and the opposite end of the shaft 16 is tapered as indicated at 20. (See Figure 5.) The tapered portion 2O of the shaft 16 has a slot 22 cut therein extending only partially dia-metrically` therethrough for -a purpose hereinafter to be fully set forth.

For sliding the shaft 16 I provide a lever 24 having a yolred portion 26 straddling the shaft. The yoked portion 26 coacts with shoulders at the end of a reduced portion 28 of the. shaft 16. The lever 24 is pivoted at one end as indicated at 30 to a boss 32. The other end of the lever is provided with a handle 34.

My device includes a pair of saw setting rollers 36 and 38 mounted or suitably secured The shaft 40 is journaled in uprights 44 and 46 which are p-art of a frame A.

An operating crank 48 is secured to the shaft 40 whereby the same may be manually rotated. The shaft 42 has one end journaled in the `upright 46 and itsV other end journaled ina block 50 which is slidably mounted relative to the upright 44. A slot 52 is 'provided in the upright 44 to receive the block 50, the block itself being provided with flanges 54 thereon, to prevent dislodgment of the block from the slot 52.

The block 50 is limited as to the upward movement in the slot 52 by` means of a set screw 56, terminating in a handle 58. Lock nuts are provided on the set screw 56 to limit the downward movement thereof when rotated in a predetermined "direction,

CII

The shaft -lO acts as a drive shaft when rotated by the crank 418 and is provided with a pinion 82 for driving the shaft 42. 'l' he shal't 42 is provided with a pinion Gelcoaeting with the pinion (32. rhe roller 36 is provided with a tongue (58 adapted to coact with the slot ot the shaft l5 when the shaft assumes a predetermined position.

rlhe 'frame A is provided with laterally extending arms 68 which are pivoted to t base l by means ot' pin 70 and bosser-i The 'trame A may be raised to an uprignt position as shown in the Figure 3 and in such position rests against stops 74- as shown in dotted lines in Figure 3.

l have illustrated my device in connection with a tubular saw B consisting of a sleeve 7G interna dy tapered and having a coupling .78 screw threaded thereon. A tubular saw member 8() is also threaded to extend into the coupling 78. rlie sleeve 7G is provided with an annular enlargement 82 having slot 8l. The shaft 1G is provided with a pin 8G adapted to enter the slot ot the sleeve 76. ln Figure the bearing lil is illustrated as having a recess 88 into which the pin 8G may be drawn.

T he saw setting roller 36 is provided with a plurality of longitudinal grooves 90, adapted to correspond with every other tooth 92 ot the tubular saw member 80. Between the grooves 90, the roller 3G at one end thereof is provided with tapered lugs 94. Adjacent the lngged end of the roller 86 a stop washer 96 provided. The saw setting roller 38 is provided with a plurality of depressions 98 adapted when the two rollers are rotated with their peripheri es together to receive the lugs 9&1- ot the roller 8G. Between the depressions 98 tapered lugs 100 are provided on the roller 38.

Practical operation In the operation ot my device the frame A is swung to the dotted line position shown in Figure 8, whereupon the tubular saw meinber and the sleeve to which it is attached may be positioned on the tapered portion o'l of the shaft 16. The notch 8e is caused to be aligned with the pin 8G whereby the teeth 92 ot the tubular saw member 8O assume a predetermined position relative to the slot 22.

The frame A is then lowered, the set. screw 5G tightened so as to limitrthe upward movement of the block 50 and consequently the roller 88 whereafter the operator begins to rotate the shaft 40. As he rotates the shaft At0 he pulls the handle 34 toward the right so that the guide blade G6 on t-he roller 3G may enter the tubular saw 80 and linally be pushed into the slot 22. By designing the blade 66 oii'set from the center ot' the roller 36 it will be obvious that the shaft 1G may be rotated by the shaft due to the blade G6 en- 'tering the groove 22 with the teeth 92 of the saw 80 assuming a predetermined position so hat every other tooth ot the saw 8() overlies a groove 90 or the roller 3G.

The operator7 during the saw setting operation, continues to turn the crank 48 and To at the same time move the handle 34 toward the right which causes the saw 8O to progref'- sively assume the positions shown respectively in Figures 6, 7 and 8. In Figure 6 the saw is starting on to the roller 3G. In doing 75 so it has engaged the bevelled end 38a, oi" the roller 88 and raised it the thickness ol tht` saw. (since the roller would normally assume a position against the roller 36 by gravity as shown in Figure 5). Figure 7 illustrates so every other tooth 92 just starting on to the lugs 94 ot the roller 36, whereby halt ot the teeth as indicated by the reference numeral 92a are set by being bent outwardly and the other hal'll 925 are set by being bent inwardlyv S5 by the lugs 100 of the roller 38.

This bending or setting of the teeth is a gradual rolling process since the handle fill is slowly moved toward the right. while the shaft Ll() is being continually rotated. The inwardly bent teeth 927) extend into the grooves 90 ot the roller 3G while the outwardly bent teeth 92?) extend into the depressions 98 of the roller 38, as clearly shown in Figures 7 and 8. lllben the ends of the teeth 92 en- 95 gage the stop washer 9G whereupon the teeth have been 'fully and the saw now ready to be removed trom the device.

ln removing the saw, the set screw 5G is first loosened alter which the lever 34 is 100 moved to the lett thereby removing the saw from the roller 8G as shown in Figure 9. It will be noted that the inwardly set teeth 92o. are being pulled through the grooves 90 while the upper most outwardly set tooth 927) has,io5 been pulled from the recesses 98 and. in sliding has raised the roller 38. Thus. it will be obvious that loosening the set screw 5G has provided the necessary clearance between the set screw and the block to allow the roller iro 88 to move upwardly so as not lo pull the .sr-l, out of the upper most tooth 9271. The lock nuts may be set at any desired position to accommodate tubular saw of diferent thicknesses or for varying` the amount ol set Wi as desired. lt will be noted that the maximum amount of set has been given to the .saw illustrated in the drawings.

Further movement ot the handle Bello the left will cause the enlargement 82 ot the saw B to engage the bearing l/-lafter which further movement ot the shaft 1 6 will canse the pin 86 to be drawn into the recess 88. This results in the tubular saw being forced 1g; Jfrom the tapered portion 2U oi the shait 16. The trame A may now be raised so that the saw may be removed from the saw setting device. A screw llO is provided Jror the purpose of adjusting the height of the trame A and thereby aligninof the axis of the roller 36 with the axis ot the tubular saw.

lili/There it is desirable to mount the uprights and permanently on the base 10, the shai't iti may be arranged to slide away from the roller a greater dist-ance for allowing the tubular saw to be placed in the device or remover therefrom. Instead ot the blade 66 and slot 22 for rotating the saw, an additional shaft could be provided. Such shaft could be geared to the pinion 62 and to the shaft 16V by cutting teeth in the shaft 16. To allow for sliding movement of the shaft 16, the teeth cut therein could be arranged to extend a considerable distance longitudinally thereof.

Although I have illustrated a specific type of tubular sew to be used in connection with the device, other types may be also set, such as those of split tubular type now in general use. A slight modification inv the shai't 1G, so that it may support other types of tubular saws may be made without departing from the real spirit and purpose of my invention. The coacting rollers 3G and 38 may also he used 'for setting a straight saw such as a hand saw, the lugs 94 and 100 being designed for the particular teeth of the saw. A suitable guide could be arranged for the straight saw so it may be moved lengthwise between the rollers anc 38 while they are rotating, whereupon the teeth ot suoli saw will have set rolled into them.

Some changes may be made in the construction and arrangement of the parts of my device without departing from the real spirit and purpose of my invention, and it is my intention to cover by my claims, any modified forms ot structure or use of mechanical equivalents` which vmay be reasonably included within their scope.

I claim as my invention:

i. A tubular saw setting device comprising means for supporting a tubular saw and for moving it longitudinally of' its axis, a roller oit' substantially the same external diameter as the interior diameter of said saw and adapted to be received in said saw, said roller having lugs for setting a portion of the teeth or' said saw, a second roller cooperatively associated therewith for setting the remaining portion of said teeth and means to rotate the saw while the teeth thereof are being set.

Atubular saw setting device comprising means for supporting a tubular saw, a roller to be received in said saw and being of such sine relative to the internal diameter of said saw as to support it while the teeth the-reof are being set, said roller having lugs for setting a portion of the teeth of said saw, a second roller associated therewith for setting the remaining portion of said teeth, means for rotating said first roller and means for causing corresponding rotation of the saw and the second roller from the first roller.

3. A tubular saw setting device comprising means for supporting a tubular saw, a roller to be received in said saw and being of such size relative to the internal diameter of said saw as to support it while the teeth thereof are being set, said roller having lugs for setting a portion of the teeth of' said saw, a second roller associated therewith tor setting the remaining portion of said teeth, means for rotating said first roller and tongue and slot, means for causing corresponding rotation of the said saw supporting means simultaneously with the rotation of the first roller.

a. A tubular saw setting device comprising means for supporting a tubular saw, a roller to be received in and fit said saw, said roller having lugs for setting a portion of the teeth of said saw, a second roller associated therewith for setting the remaining portion of said teeth and movable toward and away therefrom, means for rotating said first roller and means for-causing corresponding rotation of the saw and the second rollerrfrom the first roller, the second roller upon movement away from the first one, allowing removal of the saw from the first roller in a direction longitudinally of the aXis of such roller.

5. A tubular saw setting device comprising means for supporting a tubular saw, a roller to be received in said saw for thereby supporting it when being set, said roller having lugs for setting a portion of the teeth ot' said saw and a second roller and means for operatively connecting said rollers and first means together for simultaneous rotation.

6. In a tubular saw setting device, a base, a longitudinally slidable saw supporting arbor thereon adapted to be received in a tubular saw, a roller in alignment with said arbor, a second roller adjacent the first roller, said rollers having lugs for setting the teeth of said saw, means for imparting sliding movement to the arbor and means to impart rotation to the rollers for setting the teeth of the tubular saw and means to rotate the saw.

7. In a tubular saw setting device, a base, a longitudinally slidable saw supporting arbor thereon adapted to be received in a tubular saw, a frame pivoted to said base, a roller carried by s-aid frame and in alignment with said arbor, a second roller carried by said frame and adjacent the first roller, said rollers having lugs for setting the teeth of said saw, means for imparting sliding movement to the arbor and means to impart rotation to the rollers for setting the teeth of the tubular saw and means to rotate the saw supporting arbor.

8. In a tubular saw setting device, a base, a longitudinally slidable saw supporting arbor thereon adapted to be received in a tubular saw, a roller in alignment with said a rlwm; a second roller adjacent the first rollcr, safl rollers having lugs for seting' the teeth of said saw, means for lnparng` Sliding nmven'rent to the arbor and lnaans for 1nparng rol'al'ion t0 tha rOllors for Setting the tooth of tlm tubular Saw, said arbor and Said iIirSt'rOllQr having operatively coasting means m canso rotation of the arbor simultaneously with the rotation of the rollers.

Des Moines, I0 '21, February 18, 1929.

HARRY H. KNOTT. 

